The BiOrb and BiUbe tanks all come with Ceramic Media. However, you may also want to have a greater amount of Media in your tank than is originally provided. Beneficial bacteria live on the highly porous Ceramic Media. This bacteria processes the waste produced by the fish and ensures that the aquarium remains a healthy environment.

After a few years the micro holes in the Media can become clogged so replacing some may be beneficial. If you wish to change the media you should do so gradually, in stages, and not all at once. Changing the media gradually allows the existing bacteria to colonize the new media.